Materials Literature
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SiC coating was deposited on C/C composites(pre-deposited with carbon nanotubes) by chemical vapor deposition(CVD) method using CH3SiCl3 as the precursor.Coating micro-morphologies and composition were investigated by SEM and EDS,respectively.Effects of deposit temperature in the range of 1 000~1 150 ℃ on the surface…
At B3LYP/6-31G and MP2/6-31G levels,the bond dissociation energies(BDEs) of O—NO2 bond in four nitrates such as n-propyl nitrate(NPN),isopropyl nitrate(IPN),2-ethylhexyl nitrate(EHN),and tri-ethylene glycol dinitrate(Tri-EGDN) were calculated.The thermal decomposition characteristics of NPN,IPN,EHN,and Tri-EGDN were i…
The different dilatometric curves of continuous cooling transformation were measured on Gleeble-1500 thermal mechanical simulator with methods of dilatometric change and differential thermal analysis. Referencing microscopic test and hardness measurement,the critical points and phase transformation points were determi…
In order to develop a new high-performed,low-sensitive booster explosive,molding powder of e-HNIW was obtained by self-improved water slurry coating technology and was characterized by FT-IR and SEM.The results indicate that Estane is effective for coating e-HNIW, the coated surface is smooth and the angularity is red…
With an integral systems analysis computer code,the analysis model for CANDU station was built,which contains the primary heat transfer system,calandria vessel,end shield tank and the secondary sides of steam generators. The large break loss of coolant accident (LLOCA) at reactor outlet header with low pressure inject…
Single crystalline Ge nanorods were prepared under a hydrothermal deposition process at 400 ℃ and 7.1～8.0 MPa by using of Ge and GeO2 as the starting materials.The results using the different metal sheets as the deposition substrates show that copper substrate is an important factor for the formation of the nanorods.B…
Diamond is a perfect material with tremendous potential in the semiconductor field due to its extreme physical and chemical properties,especially its unique electronic and thermal properties.The advantages of diamond are shown by reviewing the properties of diamond and comparing it with other semiconductors.The doping…
Chenghu,a medium-size and shallow lake,is situated in the central Taihu Plain of Lower Changjiang River,China.In its north-central part,a temporal water pumped area from 2003~2007,there have developed a NNW-SSE paleo-channel filled up with deposits on the flat bottom.Sediment core(SC7) from this paleo-channel near the…
The process,principle and characteristics of recovery of NOx from adipic acid unit are introduced.The factors affecting the stable operation of the unit are analyzed,which provides theoretical and practical references for long-period operation.
Nuclear magnetic resonance studies of the hydrated cobalt oxide superconductor NaxCoO2·1.3H2O are reviewed.The results indicate that line nodes are present in the gap function,and that the Cooper pairs are in the spin-singlet state.The antiferromagnetic spin correlations are found to play an important role in producin…
Some elements such as Mg,Ti,Nb were added in Al alloy sacrificial anodes.The effects of these elements and correlated second phases on the properties of the anodes were investigated.In the studied anodes, Mg has two existing states which are solid solution and second phase separately.For the second phase,there are T-p…
The field experiments over 3 years showed that micro-cut tapping with gas-stimulation on mature PR107(20 years old) increased the yield and labour efficiency,but decreased dry rubber content and total solid content.The latex physiological metabolism maintained in safe level.
Polarization Beam-Spliter(PBS)and Polarization Conversion System(PCS)are applied to the LCD or LCoS MD projectors,with which to produce polarization beam.According to the physical optics theory,the light will reflect and refract at the interface of the different medium.The reflect light and the refract light are both…
Taking the SMA pavement of a highway project in Yunnan province as an example,combining local climate,traffic conditions and raw material characteristics,it studies mix proportion design method of the SMA pavement and its pavement performance,and draws relevant conclusions,with a view to guide better application of th…
The hydrothermal reactions of 5-bromoisophthalic acid(H2BIPA),benzotriazole(HBTA) with Cd(NO3)2· 4H2O in basified solvent gave rise to a coordination polymer [Cd3(HBTA)2(BIPA)3]n(1),which has been characterized by elemental analysis,IR and single-crystal X-ray diffraction.Complex 1 presents a two-dimensional(2D) layer…
Numerical simulations for catalytic converter in recent years are reviewed.Several common evaluating indicators of the catalytic converter performance are enumerated,including the velocity distribution,pressure loss,temperature field and incipient combustion performance of the catalytic converter while the impact fact…
ZnO nanorods are synthsized by the hydrythermal method,with the diameter of about 30 nm,and their structures are characterized by the X-ray diffraction,the transmission electron microscopy and the Raman spectra. Their optical properties are also studied,such as photoluminescent spectra and temperature dependence photo…
The crystal growth and morphology of poly(p-phenylene sulfide)(PPS) with low-molecular mass crystallized isothermally from the melt were investigated by an optical microscope in real time and by DSC.The results suggest that the spherulite growth rate enhanced with the increasing thermal crosslinking time at first,but…
By analyzing the failure of Charpy impact test of the thick-walled channel forgings,corrective measures were presented,and it showed the importance of heat treatment process of the thick-walled channel forgings.
Mesoporous SBA-15 materials were functionalized with amine groups through postsynthesis, and resulting functionalized material was investigated as matrix for controlled drug delivery. The structure, composition and framework of the material were investigated by means of X-ray diffraction (XRD), intelligent weight anal…